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What is the nature of the roots of the equation \\(x^2+2(a+1)x+a^2+2a+5=0\\)?

Answer and explanation

Correct answer: No real roots

For a quadratic equation, the discriminant is \(D=b^2-4ac\). Here, \(a_1=1\), \(b=2(a+1)\), and \(c=a^2+2a+5\). Thus, \(D=[2(a+1)]^2-4(a^2+2a+5)=-16<0\). Therefore, for every real value of \(a\), the equation has no real roots. Exam tip: When \(D<0\), the roots are non-real and conjugate to each other.

Related tags

Quadratic EquationsNature Of RootsDiscriminantNo Real RootsClass 10 MathematicsMathematicsClass 10 Mcq

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